Cardboard box



Patented Jan. 3, 1933 UNITED STATES ERIK MANNE HOLMER, OF GOTTENIBORG, SWEDEN CARDBOARD BOX Application filed July 1, 1930, Serial No. 465,215, and in Sweden January 14, 1930.

This invention relates to cardboard boxes and their covers which are stored in flat or collapsed condition and are set up only when they are required for use. Boxes of this kind are frequently used for packing pastry, bread and like articles. A blank made of cardboard or mill-board is, for this purpose, provided with creases and slits to provide sides hinged to a bottom and flaps hinged to the sides and serving for securing together two adjoining sides. It is known to provide such blanks with clips fixed to the sides at the top edge and to bend the clips over the tuck-in flaps for the purpose of securing a side to a tucked-in flap.

The essential feature of the invention is the fact that the clips are so arranged at the edges of the cardboard blank that their turnable ends lie within the edges of the blank, and that the edges have notches into which the clips are turned.

Another feature of the invention is the fact that the hinged flaps have notches corresponding to the notches in the edges of the sides.

The improved cardboard box is shown in the accompanying drawing:

Fig. 1 showing in plan the flat blank of which the cardboard box is made, and

Fig. 2 an elevation of the box set up for use.

A rectangular cardboard blank 1 is scored along lines 2 and slit along lines 3 in known manner to provide for hinged sides connected to a bottom or central portion 4. The sides are provided with clips 5 of a known kind, but according to the invention these clips do not extend outside the blank edges 6, the outer ends of the clips being flush with said edges. A notch 7 is made in the cardboard edge just below the bendable portion of each clip 5, and a notch 8 of exactly the same shape, is made in each foldable flap 9 at the point which, when the box is erected,

will register with the notches 7, the flaps being, during the erection of the box, tucked inside so as to lie inside the adjacent side of the box, as shown in Fig. 2. After the box has been set up by folding up the sides and tucking in the flaps 9, the clips are bent manually around the side and flap edges in the usual manner with the difference only that by this invention the clips will bind the edges together at the bottom of the notches 7 and 8. In this manner the important advantage This is clearly shown in Fig. 2 where the 6G notches 7, 8 register exactly and the clip 5 is of the same width as the said notches. By this means the arrangement of the clips pro vides not only a reliable binding together of the box portions, but also facilitates packing 65 and storing of the flat blanks shown in Fig. 1, inasmuch as the clips do not project outside the cardboard edges. This reduces the space required for the storing of the blanks and also avoids the risk of breaking the clips and injuring the fingers.

As the clips are narrower than the fingers used for bending them, the notches 7, 8 may have their corners cut off in order to facilitate the bending of the clips by the fingers.

It is not essential that the notch 7 be identical as regards shape with the notch 8, as it may be of different shape. The box material may, for instance, be cut away at one or both sides, as shown by line 10 in Fig. 1.

I claim 1. A cardboard blank comprising a bottom, four sides hinged to said bottom, corner flaps hinged to said sides, said flaps and sides having cooperating notches therein, and clips secured at one end below certain of said notches with the unturned end thereof terminating within the blank edge.

2. A cardboard blank for boxes and covers comprising a bottom portion, four sides hinged to said bottom portion, corner flaps hinged to said sides, said sides having notches therein and foldable clips secured at one end below said notches with. the unfolded end of said clips terminating within the blank edge. 95

3. A cardboard blank for boxes and covers comprising a bottom portion, four sides hinged to said bottom portion, corner flaps hinged to said sides, said sides having notches therein and foldable clips secured at one end below said notches with the unfolded end of said clips terminating substantially at the blank edge.

4:. A cardboard blank comprising a bottom,

four sides hinged to said bottom, corner flaps hinged to said sides, said flaps and sides having cooperating notches therein, and clips secured at one end below certain of said notches with the unturned-end thereof terminating substantially at the blank edge.

In testimony Wh GIGOf'I have signed my name to this specification.

ERIK MANNE HOLMER. 

